| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
4%
|
| 0 | 1 |
1%
|
|
| 1 | 4 |
4%
|
|
| 2 | 7 |
7%
|
|
| 3 | 2 |
2%
|
|
| 4 | 3 |
3%
|
|
| 5 | 4 |
4%
|
|
| 7 | 1 |
1%
|
|
| 8 | 1 |
1%
|
|
| 10 | 5 |
5%
|
|
| 11 | 2 |
2%
|
|
| 12 | 1 |
1%
|
|
| 14 | 1 |
1%
|
|
| 15 | 5 |
5%
|
|
| 20 | 5 |
5%
|
|
| 23 | 1 |
1%
|
|
| 25 | 4 |
4%
|
|
| 30 | 8 |
8%
|
|
| 35 | 2 |
2%
|
|
| 40 | 5 |
5%
|
|
| 50 | 13 |
13%
|
|
| 60 | 7 |
7%
|
|
| 70 | 3 |
3%
|
|
| 75 | 3 |
3%
|
|
| 80 | 1 |
1%
|
|
| 90 | 2 |
2%
|
|
| 99 | 1 |
1%
|
|
| 100 | 4 |
4%
|
|
| Sysmiss | 51 |